The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2006
Filed:
May. 14, 2004
Applicants:
Kenji Kojima, Kawasaki, JP;
Tomotaka Takahashi, Kawasaki, JP;
Inventors:
Kenji Kojima, Kawasaki, JP;
Tomotaka Takahashi, Kawasaki, JP;
Assignee:
Mitutoyo Corporation, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 5/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A plurality of photodiodes are disposed along a measurement axis on an optical receipt chip of a photoelectric encoder. Formed on each light acceptance surface of these photodiodes is a second optical grating which has more than one light shield portion extending in a 'y' direction. Each acceptance surface has a portion that is disposed obliquely relative to the extending direction of the light shield portion.